Marquell sits next to 3 phonetic neighbors — Marcel, Marquise, and Marcellus are the closest matches by sound. Most share Marquell's Roman/Latin-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"of Mars, warlike"
"Brock's settlement (place name origin)"
"divine protection, God's helmet"
"rye clearing"
"spear ruler, spear power"
"bear (totem name)"
"God is my strength, helped by God"
"hay valley"
"large town, community"
"meadow clearing"
"godlike strength"
"ridge meadow"
"rising, ascending"
"variant of Waylon, legendary smith"
"warrior people of East Africa"
"land of Eoghan (Owen's territory)"
"strong decision-maker"
"peace-giver, one who pacifies"
"well-born (through Owen/Eugenius)"
"whole, powerful"
"little bay, small inlet"
Similar sound: These names share phonetic patterns with Marquell — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Roman/Latin origins, giving them the same cultural heritage as Marquell.
Rhythm: Marquell is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.